Today the city government has taken measures to prevent a repetition of last year's confrontation.

今天市政府已经采取了措施来防止去年的冲突重演。

He wants to avoid repetition of the confusion that followed the discovery of the cystic fibrosis gene.

他想避免因发现囊性纤维化致病基因而引起的混乱局面再次出现。

He could also have cut out much of the repetition and thus saved many pages.

他本来也可以删掉很多重复的语句，省去很多页数。

Unnecessary repetition weakens sentences.

不必要的词语重复会削弱句子的力量。